RTV ECU

[T Skaggs]

Has anyone ever had a ECU for a RTV repaired?

 

[lugbolt]

Not that I know of. Which RTV do you have that needs the ecu repaired?

 

[mikester]

ECU failures seem pretty rare IMHO I'd be looking for bad sensors or ground and wire harness issues.

 

[T Skaggs]

Not that I know of. Which RTV do you have that needs the ecu repaired?

RTV 400 ci. I cannot get the required voltage out of the ecu to fire the injector

 

[lugbolt]

normally injector is fed by +12v constant with key on at one wire. The other wire on the injector is usually pulsed by the ECU.

with that said, are you testing the correct wire? You'll want a DVOM, and a WSM for testing. And also would need to learn to do a voltage drop test if you don't already know how.

 

[T Skaggs]

Thanks lugbolt, I have a manual with the pin locations and I believe that I'm testing the correct terminals but I will double check that. I cant hardly believe that the ECU is bad because the unit was running before the engine rebuild. I will go back and recheck my sensors and grounds to see if I over looked something.

 

[GreensvilleJay]

Kinda curious.... how did the mechanic test the 'rebuilt engine' without the ECU ??

 

[T Skaggs]

I rebuilt the engine myself, the unit has not started after the rebuild except for the times I shot gas down the throttle body. It will start a run as long as your squirting gas to it. The ECU module was on it but not firing the injector.

 

[lugbolt]

it's possible that the ecu isn't seeing crank sensor signal. This will cause injectors to fail to pulse.

 

[North Idaho Wolfman]

Did the injectors get changed?

 

[T Skaggs]

Great, thanks lugbolt I will check the crank sensor. Wolfman, I did replace the injector, thanks for the comment.

 

[T Skaggs]

Not sure where the crank sensor is located, the manual does not show one.